I have lots of problems with the cloth simulation when working on a superhero cape for my figure.  Every time I apply the contained group to the shoulder of the cape, the mesh would crunch up, slowing the simulation to a crawl.  I need this group so the cape would follow the movement of the figure shoulders when she's flying with arms forward.  (Poser would also often display an error message saying the simulation fails at frame X) ( choreographed group is auto-applied as well.)

I tried removing the choreographed group, the cape fell off. 

I'm including extra information if they are helpful:

Poser 11.3.818

My cloth collision setting is as following: 

System:

MacOS Monterey Version 12.3.1

3.8 GHz 8-Core Intel Core i7

32 GB 2667 MHz DDR4

AMD Radeon Pro 5700 Xt 16 GB

Any help would be greatly appreciated, thanks!

Did the simulation fail when you didn't have it constrained? If it did, there might be a problem with the mesh. Otherwise, can you post a screenshot of the constrained group?

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I use Poser 13 and win 10

Umm..the cape is a prop.  I can try turning it into a figure in the setup room.  I'll try that later today.  

Only props work in the Cloth Room, converting it into a conforming figure will involve further rigging.  There could be a number of problems that can cause a simulation failure.  Lack of mesh subdivision, two-sided mesh, the main figure not posed correctly restricting the prop during simulation, etc.

Ok, any good tutorials on this? 

If you have access to YouTube, I suggest conducting a search on Poser Cloth Room.  You will get numerous tutorial postings.  There should be several tutorials here on Rendo.

I already did, none of them really helps.  I can do the dynamics just fine.  The main problem is when I pose my figure in a flying pose, the shoulder part of the cape do not follow the collar of my figure, it ends inside my figure.   Like I said before I want this part to move with the figure's shoulders.  I applied the choreographed group and constrained group on the shoulder part of the cape.  However the cape either falls off (It is parented to my figure's chest) or the shoulder mesh gets messed up. Not sure what I am doing wrong.  (The cape is a prop)

I have seen numerous situations in which the "Start draping from zero pose" was more a problem than a solution. Now, I systematically remove that checkbox, and only if it fails I check it.

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Try this:

In the cloth room(with your cloth item selected)  select  'choreographed group' and remove all, do the same with 'constrained group' , multi-grouped vertices is a no-no.(the Choreographed group Has another function other than what you're intending.)

Now in the constrained tab select the vertices on the leading edge of your cape you wish to remain glued to your character, usually only the first or second row is plenty to get the job done.

Test your simulation:

If you see errant vertices(jaggies) select those vertices (BEFORE Clearing the simulation) and add them to the 'soft decorated' group and re-simulate.

If you're still not satisfied with the results, go to 'simulation settings' and change your 'steps per frame' to '4' and re-simulate. If that doesn't do it try 6, 8,... you get the idea...

NOTE: If this item is for personal use in your own animation, the steps outlines above are fine, If however you want to market the item, and you have errant vertices, you're selling a defective product that needs to be re-worked.

Y'all have a great day.

ps: The first frame of a simulation takes a little longer to  calculate, if you reach frame 3-4 and its taking longer than, say 10seconds(depending on your computer), stop your simulation find and fix those 'jaggies' before continuing.... no need to waste time waiting for simulation to complete.

Y'all have a great day.